Gnomish
rô
adjective. enduring, long suffering; quiet, gentle, docile
rô
noun. [unglossed]
rô-
verb. to remain, stay, stand; to endure
There are more words but they are from Tolkien's earlier conceptional periods. Tolkien likely changed these words as he evolved the aesthetics and completeness of the languages. You may even find languages that Tolkien later rejected. Do not mix words from different time periods unless you are familiar with the phonetic developments.
Below: Tolkien's Late Period (1950–1973). These are from Tolkien's late conceptual period — his most settled forms of the languages. Prefer these over the earlier ones above when composing new text.
A verb in the Gnomish Lexicon of the 1910s glossed “remain, stay, stand”, which in combination with the dative also meant “endure” (GL/47). It appeared above an adjective form G. rô “enduring, long suffering; quiet, gentle, docile”. There was a bar joining these two words, an “X” next to the bar possibly indicating their rejection. These words may have been based on the early root ᴱ√RU’U with derivatives like ᴱQ. rue “rest, stillness, remaining, steadfastness” (QL/80).